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vekshin1
3 years ago
5

Is air an element, compound, homogeneous mixture, or a heterogeneous mixture?

Chemistry
1 answer:
Irina-Kira [14]3 years ago
6 0
Air is a homogeneous mixture, consisting of <span>nitrogen, oxygen, carbon dioxide and other gases present in air.</span>
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In a certain city, electricity costs $0.13 per kW·h. What is the annual cost for electricity to power a lamp-post for 5.50 hours
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We know power=work done/time taken
power*time= work
100watt=0.1kw
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0.1*5.5=0.55kwh
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4 years ago
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